Cutting tool insert



FIG. 1 is a perspective view of a cutting tool insert showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a side elevational view, all remaining sides being identical thereto; and,

FIG. 4 is a cross-sectional view taken along line IV--IV in FIG. 2. 

The ornamental design for a cutting tool insert, as shown and described. 